During ecological succession of an ecosystem new organisms begin to grow and the ecosystem begins to recover. This is the way ecosystems repair themselves after a disaster.
All things are made of cells (both algae and daisies are made of cells)
All cells come from pre-existing cells (both bacteria and horse cells had cells that made their cells)
Cells are the smallest unit of life (nothing is smaller than cells not grass cells or fungi cells)
Mouth, esophagus, stomach, small intestine, large intestine and anus
The Brainstem is the innermost region of the brain
No more than five trophic levels are present in an ecosystem, most have only 4.